Guilt-edged Ivory

You marry into an Ivoran family, you have to accept your life is going to be complicated. Okay, your new sister-in-law has always been a little wild, but that's no reason she should be accused of murder. Or your husband either, dammit, and why is everyone looking at him that way? Don't they understand that he doesn't go around killing people? Or, well... not very often, anyway. In which our heroes turn detective to clear the family name.